Treatments with nirogacestat

ABSTRACT

The present disclosure relates to improved methods of treatment with nirogacestat.

The present application claims the benefit of U.S. Provisional Application No. 63/365,125, filed May 20, 2022 and U.S. Provisional Application No. 63/365,193, filed May 23, 2022, each of which is hereby incorporated by reference.

FIELD OF THE INVENTION

The present disclosure relates to improved methods of treatment with nirogacestat.

BACKGROUND

(S)-2-(((S)-6,8-difluoro-1,2,3,4-tetrahydronaphthalen-2-yl)amino)-N-(1-(2-methyl-1-(neopentylamino) propan-2-yl)-1H-imidazol-4-yl)pentanamide (“nirogacestat” or compound of Formula (I) shown below) is a gamma-secretase inhibitor which can inhibit Aβ-peptide production.

Desmoid tumors, also referred to as aggressive fibromatosis, are rare, locally invasive, slow growing soft tissue tumors. According to the World Health Organization, desmoid tumors are defined as clonal fibroblastic proliferations that arise in the deep soft tissue and are characterized by infiltrative growth and a tendency toward local recurrence but an inability to metastasize (Kasper et al., Oncologist, 2011, 16(5):682-93). Desmoid tumors are considered benign; however, they cause significant morbidity by infiltrating or exerting mass effects on vital structures (Lewis et al., Ann Surg. 1999, 229(6):866-72; Smith et al., Br J Surg. 2000, 87(5):608-13). Desmoid tumors include soft tissue masses arising in any part of the body in different varieties of connective tissue, including muscle and fascia aponeurosis. Desmoid tumors infiltrate surrounding structures and spread along plains and muscle, which can lead to severe pain, functional impairment, and more rarely, life-threatening conditions (Penel et al., Eur J Cancer. 2017, 83:125-31). Despite the benign nature of desmoid tumors, they can behave aggressively, causing significant morbidity, with elevated rates of local recurrence (as high as 60%) despite wide excisions (Penel, 2017).

Accordingly, there is a current need for compositions comprising nirogacestat or a pharmaceutically acceptable salt thereof, to treat patients having a disease or disorder amenable to treatment with a gamma-secretase inhibitor.

SUMMARY OF THE INVENTION

The present invention includes improvement methods of treating conditions responsive to inhibition of gamma secretase, such as desmoid tumor, multiple myeloma, ovarian granulosa cell tumors, with nirogacestat and pharmaceutically acceptable salts thereof.

One embodiment is a method for treating a condition responsive to inhibition of gamma secretase, such as desmoid tumor or multiple myeloma, in a patient in need thereof comprising orally administering to the patient 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, where the method comprises one or more of:

-   -   (a) upon the patient having a Grade 3 diarrhea persisting for at         least 3 days despite maximal medical therapy, withholding the         nirogacestat or pharmaceutically acceptable salt thereof until         the diarrhea is resolved to no higher than a Grade 1 diarrhea or         baseline and then restarting oral administration of the         nirogacestat or pharmaceutically acceptable salt thereof at a         dose of 100 mg (free base equivalent dose) twice daily;     -   (b) upon the patient having a Grade 3 folliculitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the folliculitis is resolved to no higher than a Grade 1         folliculitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 100 mg (free base equivalent dose) twice daily;     -   (c) upon the patient having a Grade 3 maculopapular rash,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the maculopapular rash is resolved to no higher         than a Grade 1 maculopapular rash or baseline and then         restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily;     -   (d) upon the patient having a Grade 3 hidradenitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the hidradenitis is resolved to no higher than a Grade 1         hidradenitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 100 mg (free base equivalent dose) twice daily;     -   (e) upon the patient having Grade 3 hypophosphatemia persisting         for at least 7 days despite maximal replacement therapy,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the hypophosphatemia is resolved to no higher than         a Grade 1 hypophosphatemia or baseline and then restarting oral         administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 100 mg (free base         equivalent dose) twice daily;     -   (f) upon the patient having Grade 3 hypokalemia despite maximal         replacement therapy, withholding the nirogacestat or         pharmaceutically acceptable salt thereof until the hypokalemia         is resolved to no higher than a Grade 1 hypokalemia or baseline         and then restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily; and     -   (g) upon the patient having an alanine transaminase (ALT) or         aspartate aminotransferase (AST) of 3 to 5 times upper limit of         normal (ULN), withholding the nirogacestat or pharmaceutically         acceptable salt thereof until the ALT, AST, or both are resolved         to no higher than 3 times ULN or baseline and then restarting         oral administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 100 mg (free base         equivalent dose) twice daily.

In one embodiment, the method further comprises one or more of:

-   -   (h) upon the patient having an ALT or AST of greater than 5         times ULN, permanently discontinuing treatment with the         nirogacestat or pharmaceutically acceptable salt thereof;     -   (i) upon the patient having anaphylaxis or other severe         hypersensitivity reaction, permanently discontinuing treatment         with the nirogacestat or pharmaceutically acceptable salt         thereof; and     -   (j) for another severe adverse reaction or in the event of a         life-threatening adverse reaction, withholding the nirogacestat         or pharmaceutically acceptable salt thereof until the adverse         reaction is resolved to no higher than a Grade 1 adverse         reaction or baseline and then, after carefully considering the         potential benefit and likelihood recurrence of the adverse         reaction, (A) restarting oral administration of the nirogacestat         or pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily and (B) upon recurrence         of the severe or life-threatening adverse reaction at the 100 mg         (free base equivalent dose) twice daily dose, permanently         discontinuing treatment with the nirogacestat or         pharmaceutically acceptable salt thereof.

In another embodiment, the method comprises (a) upon the patient having a Grade 3 diarrhea persisting for at least 3 days despite maximal medical therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the diarrhea is resolved to no higher than a Grade 1 diarrhea or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.

In yet another embodiment, the method comprises (b) upon the patient having a Grade 3 folliculitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the folliculitis is resolved to no higher than a Grade 1 folliculitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.

In yet another embodiment, the method comprises (c) upon the patient having a Grade 3 maculopapular rash, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the maculopapular rash is resolved to no higher than a Grade 1 maculopapular rash or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.

In yet another embodiment, the method comprises (d) upon the patient having a Grade 3 hidradenitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hidradenitis is resolved to no higher than a Grade 1 hidradenitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.

In yet another embodiment, the method comprises (e) upon the patient having a Grade 3 hypophosphatemia persisting for at least 7 days despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypophosphatemia is resolved to no higher than a Grade 1 hypophosphatemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.

In yet another embodiment, the method comprises (f) upon the patient having a Grade 3 hypokalemia despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypokalemia is resolved to no higher than a Grade 1 hypokalemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.

In yet another embodiment, the method comprises (g) upon the patient having an ALT or AST of 3 to 5 times ULN, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the ALT, AST, or both are resolved to no higher than 3 times ULN or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.

In yet another embodiment, the method comprises (h) upon the patient having an ALT or AST of greater than 5 times ULN, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof.

In yet another embodiment, the method comprises (i) upon the patient having anaphylaxis or other severe hypersensitivity reaction, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof.

In yet another embodiment, the method comprises:

-   -   (a) upon the patient having a Grade 3 diarrhea persisting for at         least 3 days despite maximal medical therapy, withholding the         nirogacestat or pharmaceutically acceptable salt thereof until         the diarrhea is resolved to no higher than a Grade 1 diarrhea or         baseline and then restarting oral administration of the         nirogacestat or pharmaceutically acceptable salt thereof at a         dose of 100 mg (free base equivalent dose) twice daily;     -   (b) upon the patient having a Grade 3 folliculitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the folliculitis is resolved to no higher than a Grade 1         folliculitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 100 mg (free base equivalent dose) twice daily;     -   (c) upon the patient having a Grade 3 maculopapular rash,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the maculopapular rash is resolved to no higher         than a Grade 1 maculopapular rash or baseline and then         restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily;     -   (d) upon the patient having a Grade 3 hidradenitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the hidradenitis is resolved to no higher than a Grade 1         hidradenitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 100 mg (free base equivalent dose) twice daily;     -   (e) upon the patient having Grade 3 hypophosphatemia persisting         for at least 7 days despite maximal replacement therapy,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the hypophosphatemia is resolved to no higher than         a Grade 1 hypophosphatemia or baseline and then restarting oral         administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 100 mg (free base         equivalent dose) twice daily;     -   (f) upon the patient having Grade 3 hypokalemia despite maximal         replacement therapy, withholding the nirogacestat or         pharmaceutically acceptable salt thereof until the hypokalemia         is resolved to no higher than a Grade 1 hypokalemia or baseline         and then restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily; and     -   (g) upon the patient having an ALT or AST of 3 to 5 times ULN,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the ALT, AST, or both are resolved to no higher         than 3 times ULN or baseline and then restarting oral         administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 100 mg (free base         equivalent dose) twice daily.

In yet another embodiment, the method comprises:

-   -   (a) upon the patient having a Grade 3 diarrhea persisting for at         least 3 days despite maximal medical therapy, withholding the         nirogacestat or pharmaceutically acceptable salt thereof until         the diarrhea is resolved to no higher than a Grade 1 diarrhea or         baseline and then restarting oral administration of the         nirogacestat or pharmaceutically acceptable salt thereof at a         dose of 100 mg (free base equivalent dose) twice daily;     -   (b) upon the patient having a Grade 3 folliculitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the folliculitis is resolved to no higher than a Grade 1         folliculitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 100 mg (free base equivalent dose) twice daily;     -   (c) upon the patient having a Grade 3 maculopapular rash,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the maculopapular rash is resolved to no higher         than a Grade 1 maculopapular rash or baseline and then         restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily;     -   (d) upon the patient having a Grade 3 hidradenitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the hidradenitis is resolved to no higher than a Grade 1         hidradenitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 100 mg (free base equivalent dose) twice daily;     -   (e) upon the patient having Grade 3 hypophosphatemia persisting         for at least 7 days despite maximal replacement therapy,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the hypophosphatemia is resolved to no higher than         a Grade 1 hypophosphatemia or baseline and then restarting oral         administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 100 mg (free base         equivalent dose) twice daily;     -   (f) upon the patient having Grade 3 hypokalemia despite maximal         replacement therapy, withholding the nirogacestat or         pharmaceutically acceptable salt thereof until the hypokalemia         is resolved to no higher than a Grade 1 hypokalemia or baseline         and then restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily;     -   (g) upon the patient having an ALT or AST of 3 to 5 times ULN,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the ALT, AST, or both are resolved to no higher         than 3 times ULN or baseline and then restarting oral         administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 100 mg (free base         equivalent dose) twice daily;     -   (h) upon the patient having an ALT or AST of greater than 5         times ULN, permanently discontinuing treatment with the         nirogacestat or pharmaceutically acceptable salt thereof;     -   (i) upon the patient having anaphylaxis or other severe         hypersensitivity reaction, permanently discontinuing treatment         with the nirogacestat or pharmaceutically acceptable salt         thereof; and     -   (j) for another severe adverse reaction or in the event of a         life-threatening adverse reaction, withholding the nirogacestat         or pharmaceutically acceptable salt thereof until the adverse         reaction is resolved to no higher than a Grade 1 adverse         reaction or baseline and then, after carefully considering the         potential benefit and likelihood recurrence of the adverse         reaction, (A) restarting oral administration of the nirogacestat         or pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily and (B) upon recurrence         of the severe or life-threatening adverse reaction at the 100 mg         (free base equivalent dose) twice daily dose, permanently         discontinuing treatment with the nirogacestat or         pharmaceutically acceptable salt thereof.

In yet another embodiment, upon the patient having a Grade 3 dermatologic reaction, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the dermatologic reaction is resolved to no higher than a Grade 1 dermatologic reaction and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.

In yet another embodiment of any of the methods described herein, the patient has a mutation in the adenomatous polyposis coli (APC) tumor suppressor gene.

In yet another embodiment of any of the methods described herein, the patient has a mutation in the CTNNB1 (β-catenin) gene.

In yet another embodiment of any of the methods described herein, the patient was previously treated with one or more tyrosine kinase inhibitors (such as sorafenib, pazopanib, sunitinib, imatinib, dasatinib, nilotinib, bosutinib, asciminib, and ponatinib).

In yet another embodiment of any of the methods described herein, the patient has intraabdominal tumors.

In yet another embodiment of any of the methods described herein, the patient is an adult.

In yet another embodiment of any of the methods described herein, the patient has a family history of familial adenomatous polyposis.

In yet another embodiment of any of the methods described herein, the patient has refractory or recurrent disease after previous treatment.

In yet another embodiment of any of the methods described herein, the patient is a treatment naïve patient.

In yet another embodiment of any of the methods described herein, the patient is a post-menopausal woman.

In yet another embodiment of any of the methods described herein, the patient is a man (male patient).

In yet another embodiment of any of the methods described herein, gastric acid reducing agents are avoided or administered 4 hours after administration of the nirogacestat or pharmaceutically acceptable salt thereof.

Another embodiment is a method for treating desmoid tumor in a patient having a family history of familial adenomatous polyposis comprising orally administering to the patient 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily.

Yet another embodiment is a method for treating desmoid tumor in a treatment naïve patient comprising orally administering to the patient 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily.

In yet another embodiment of any of the methods described herein, the nirogacestat or pharmaceutically acceptable salt thereof is nirogacestat dihydrobromide.

In yet another embodiment of any of the methods described herein, the patient, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, exhibits a C_(max) of nirogacestat of from about 480 to about 950 ng/mL.

In yet another embodiment of any of the methods described herein, the patient, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, exhibits a C_(max) of nirogacestat of from about 550 to about 1100 ng/mL.

In yet another embodiment of any of the methods described herein, the patient, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, exhibits a C_(max) of nirogacestat of from about 600 to about 800 ng/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(last) of nirogacestat of less than 4000 ng·h/mL. In one embodiment, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(last) of nirogacestat of less than 4000 ng·h/mL and a C_(max) of nirogacestat of from about 480 to about 950 ng/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(last) of nirogacestat of from about 2000 to about 4000 ng·h/mL. In one embodiment, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(last) of nirogacestat of from about 2000 to about 4000 ng·h/mL and a C_(max) of nirogacestat of from about 480 to about 950 ng/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(inf) of nirogacestat of less than 4000 ng·h/mL. In one embodiment, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(inf) of nirogacestat of less than 4000 ng·h/mL and a C_(max) of nirogacestat of from about 480 to about 950 ng/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(inf) of nirogacestat of from about 2000 to about 4000 ng·h/mL. In one embodiment, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(inf) of nirogacestat of from about 2000 to about 4000 ng·h/mL and a C_(max) of nirogacestat of from about 480 to about 950 ng/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(inf) of nirogacestat of from about 2200 to about 4800 ng h/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, an AUC_(inf) of nirogacestat of from about 2200 to about 3300 ng·h/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, at steady state exposure from administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, a C_(max) of nirogacestat of from about 1000 to about 1500 ng/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, at steady state exposure from administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, a C_(max) of nirogacestat of from about 1100 to about 1400 ng/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, at steady state exposure from administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, an AUC_(tau) of nirogacestat of from about 5000 to about 8000 ng·h/mL.

In yet another embodiment of any of the methods described herein, the patient exhibits, at steady state exposure from administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, an AUC_(tau) of nirogacestat of from about 6000 to about 7000 ng·h/mL.

In one embodiment of the aforementioned methods, the patient is treated with 100 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, which is reduced to 50 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily instead of 100 mg twice daily in the event of the specified adverse reactions.

Compositions comprising a compound of Formula (I)

-   -   or a pharmaceutically acceptable salt thereof wherein the         composition provides a mean maximum drug plasma concentration         (C_(rax)) of more than 100 ng/ml are described herein.

Additionally, methods for treating desmoid tumor comprising administration to a patient in need thereof an oral dosage form comprising 50 mg of nirogacestat or a pharmaceutically acceptable salt thereof to a patient in need thereof are described herein.

Also, methods for treating desmoid tumor in a patient in need thereof comprising administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml are described herein.

Furthermore, methods for treating desmoid tumor in a patient in need thereof comprising administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 700 ng·h/ml.

Methods for treating desmoid tumor comprising administration to a patient in need thereof 300 mg per day of nirogacestat or a pharmaceutically acceptable salt thereof to a patient in need thereof are also disclosed herein.

Moreover, methods for treating desmoid tumor in a patient in need thereof comprising administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml are disclosed herein.

Methods for treating desmoid tumor in a patient in need thereof comprising administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 700 ng·h/ml are also disclosed herein.

Additionally, methods for treating multiple myeloma comprising administration to a patient in need thereof 200 mg per day of nirogacestat or a pharmaceutically acceptable salt thereof to a patient in need thereof are disclosed herein.

Also, methods for treating multiple myeloma comprising administration to a patient in need thereof 100 mg per day of nirogacestat or a pharmaceutically acceptable salt thereof to a patient in need thereof are disclosed herein.

Methods for treating multiple myeloma comprising once daily administration of 200 mg nirogacestat or a pharmaceutically acceptable salt thereof to a patient in need thereof are also disclosed herein.

Furthermore, methods for treating multiple myeloma comprising once daily administration of 150 mg (free base equivalent dose) nirogacestat or a pharmaceutically acceptable salt thereof to a patient in need thereof.

Methods for treating multiple myeloma comprising once daily administration of 100 mg nirogacestat or a pharmaceutically acceptable salt thereof to a patient in need thereof are also disclosed herein.

Additionally, methods for treating multiple myeloma comprising once daily administration of 50 mg nirogacestat or a pharmaceutically acceptable salt thereof to a patient in need thereof are disclosed herein.

Also, methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml.

Further, methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 225 ng/ml.

Methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 700 ng·h/ml are also disclosed herein.

Additionally, methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 3000 ng·h/ml are disclosed herein.

Methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml are also disclosed herein.

Additionally, methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 225 ng/ml are disclosed herein.

Further, methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 700 ng·h/ml are disclosed herein.

Methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 3000 ng·h/ml are also disclosed herein.

Also, methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient a single oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof for the concomitant treatment of multiple myeloma are disclosed herein.

Methods for treating multiple myeloma in a patient in need thereof comprising administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof in combination with belantamab mafodotin are also disclosed herein.

Yet another embodiment is a method for treating multiple myeloma in a patient in need thereof comprising concomitantly administering to the patient (i) nirogacestat or a pharmaceutically acceptable salt thereof and (ii) one or more additional active ingredients for treating multiple myeloma (e.g., a BCMA therapy (for instance, administered intravenously)), where the method comprises (A) orally administering to the patient 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily and (B) one or more of:

-   -   (a) upon the patient having a Grade 3 diarrhea persisting for at         least 3 days despite maximal medical therapy, withholding the         nirogacestat or pharmaceutically acceptable salt thereof until         the diarrhea is resolved to no higher than a Grade 1 diarrhea or         baseline and then restarting oral administration of the         nirogacestat or pharmaceutically acceptable salt thereof at a         dose of 100 mg (free base equivalent dose) twice daily;     -   (b) upon the patient having a Grade 3 folliculitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the folliculitis is resolved to no higher than a Grade 1         folliculitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 100 mg (free base equivalent dose) twice daily;     -   (c) upon the patient having a Grade 3 maculopapular rash,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the maculopapular rash is resolved to no higher         than a Grade 1 maculopapular rash or baseline and then         restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily;     -   (d) upon the patient having a Grade 3 hidradenitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the hidradenitis is resolved to no higher than a Grade 1         hidradenitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 100 mg (free base equivalent dose) twice daily;     -   (e) upon the patient having Grade 3 hypophosphatemia persisting         for at least 7 days despite maximal replacement therapy,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the hypophosphatemia is resolved to no higher than         a Grade 1 hypophosphatemia or baseline and then restarting oral         administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 100 mg (free base         equivalent dose) twice daily;     -   (f) upon the patient having Grade 3 hypokalemia despite maximal         replacement therapy, withholding the nirogacestat or         pharmaceutically acceptable salt thereof until the hypokalemia         is resolved to no higher than a Grade 1 hypokalemia or baseline         and then restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily; and     -   (g) upon the patient having an alanine transaminase (ALT) or         aspartate aminotransferase (AST) of 3 to 5 times upper limit of         normal (ULN), withholding the nirogacestat or pharmaceutically         acceptable salt thereof until the ALT, AST, or both are resolved         to no higher than 3 times ULN or baseline and then restarting         oral administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 100 mg (free base         equivalent dose) twice daily. In one preferred embodiment, the         patient is concomitantly administered a BCMA therapy. In another         embodiment, the method further comprises one or more of: (h)         upon the patient having an ALT or AST of greater than 5 times         ULN, permanently discontinuing treatment with the nirogacestat         or pharmaceutically acceptable salt thereof; (i) upon the         patient having anaphylaxis or other severe hypersensitivity         reaction, permanently discontinuing treatment with the         nirogacestat or pharmaceutically acceptable salt thereof;         and (j) for another severe adverse reaction or in the event of a         life-threatening adverse reaction, withholding the nirogacestat         or pharmaceutically acceptable salt thereof until the adverse         reaction is resolved to no higher than a Grade 1 adverse         reaction or baseline and then, after carefully considering the         potential benefit and likelihood recurrence of the adverse         reaction, (A) restarting oral administration of the nirogacestat         or pharmaceutically acceptable salt thereof at a dose of 100 mg         (free base equivalent dose) twice daily and (B) upon recurrence         of the severe or life-threatening adverse reaction at the 100 mg         (free base equivalent dose) twice daily dose, permanently         discontinuing treatment with the nirogacestat or         pharmaceutically acceptable salt thereof.

Yet another embodiment is a method for treating multiple myeloma in a patient in need thereof comprising concomitantly administering to the patient (i) nirogacestat or a pharmaceutically acceptable salt thereof and (ii) one or more additional active ingredients for treating multiple myeloma (e.g., a BCMA therapy), where the method comprises (A) orally administering to the patient 100 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily and (B) one or more of:

-   -   (a) upon the patient having a Grade 3 diarrhea persisting for at         least 3 days despite maximal medical therapy, withholding the         nirogacestat or pharmaceutically acceptable salt thereof until         the diarrhea is resolved to no higher than a Grade 1 diarrhea or         baseline and then restarting oral administration of the         nirogacestat or pharmaceutically acceptable salt thereof at a         dose of 50 mg (free base equivalent dose) twice daily;     -   (b) upon the patient having a Grade 3 folliculitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the folliculitis is resolved to no higher than a Grade 1         folliculitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 50 mg (free base equivalent dose) twice daily;     -   (c) upon the patient having a Grade 3 maculopapular rash,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the maculopapular rash is resolved to no higher         than a Grade 1 maculopapular rash or baseline and then         restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 50 mg         (free base equivalent dose) twice daily;     -   (d) upon the patient having a Grade 3 hidradenitis, withholding         the nirogacestat or pharmaceutically acceptable salt thereof         until the hidradenitis is resolved to no higher than a Grade 1         hidradenitis or baseline and then restarting oral administration         of the nirogacestat or pharmaceutically acceptable salt thereof         at a dose of 50 mg (free base equivalent dose) twice daily;     -   (e) upon the patient having Grade 3 hypophosphatemia persisting         for at least 7 days despite maximal replacement therapy,         withholding the nirogacestat or pharmaceutically acceptable salt         thereof until the hypophosphatemia is resolved to no higher than         a Grade 1 hypophosphatemia or baseline and then restarting oral         administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 50 mg (free base equivalent         dose) twice daily;     -   (f) upon the patient having Grade 3 hypokalemia despite maximal         replacement therapy, withholding the nirogacestat or         pharmaceutically acceptable salt thereof until the hypokalemia         is resolved to no higher than a Grade 1 hypokalemia or baseline         and then restarting oral administration of the nirogacestat or         pharmaceutically acceptable salt thereof at a dose of 50 mg         (free base equivalent dose) twice daily; and     -   (g) upon the patient having an alanine transaminase (ALT) or         aspartate aminotransferase (AST) of 3 to 5 times upper limit of         normal (ULN), withholding the nirogacestat or pharmaceutically         acceptable salt thereof until the ALT, AST, or both are resolved         to no higher than 3 times ULN or baseline and then restarting         oral administration of the nirogacestat or pharmaceutically         acceptable salt thereof at a dose of 50 mg (free base equivalent         dose) twice daily. In one preferred embodiment, the patient is         concomitantly administered a BCMA therapy. In another         embodiment, the method further comprises one or more of: (h)         upon the patient having an ALT or AST of greater than 5 times         ULN, permanently discontinuing treatment with the nirogacestat         or pharmaceutically acceptable salt thereof; (i) upon the         patient having anaphylaxis or other severe hypersensitivity         reaction, permanently discontinuing treatment with the         nirogacestat or pharmaceutically acceptable salt thereof;         and (j) for another severe adverse reaction or in the event of a         life-threatening adverse reaction, withholding the nirogacestat         or pharmaceutically acceptable salt thereof until the adverse         reaction is resolved to no higher than a Grade 1 adverse         reaction or baseline and then, after carefully considering the         potential benefit and likelihood recurrence of the adverse         reaction, (A) restarting oral administration of the nirogacestat         or pharmaceutically acceptable salt thereof at a dose of 50 mg         (free base equivalent dose) twice daily and (B) upon recurrence         of the severe or life-threatening adverse reaction at the 50 mg         (free base equivalent dose) twice daily dose, permanently         discontinuing treatment with the nirogacestat or         pharmaceutically acceptable salt thereof.

In some aspects, the pharmaceutically acceptable salt form of nirogacestat in the composition, dosage forms, or methods of treatments described herein is a hydrobromide salt form. In some aspects, the hydrobromide salt form is a dihydrobromide salt form.

In some aspects, the compositions or dosages are orally administered to a human. In some aspects, the compositions or dosages are in the form of a solid. In some aspects, the compositions or dosages are in the form of tablets or capsules.

In yet another embodiment of any of the methods described herein, one or more anti-emetic drugs and/or one or more anti-diarrheal drugs may be administered to the patient while being treated with nirogacestat.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schema for a Phase 3 clinical trial for the treatment of desmoid tumor with nirogacestat dihydrobromide.

FIG. 2 . is a schema for a Phase 3 clinical trial for the treatment of adult patients with desmoid tumor with uncontrollable pain.

FIG. 3 . provides a Kaplan-Meier Plot of Progression Free Survival from Randomization (ITT Population)

FIG. 4 . is a Waterfall Plot of Lowest Percent Change from Baseline in Tumor Size by RECIST 1.1 (ITT Population)

FIG. 5 . is a Waterfall Plot of Lowest Percent Change from Baseline in Tumor Size by RECIST 1.1 (ITT Population)

FIG. 6 . is the Change from Baseline in BPI SF API Score (Worst Pain in Last 24 Hours) (ITT Population)

FIG. 7 . is the Change from Baseline in DTSS Total Symptom Score (ITT Population)

FIG. 8 is the Change from Baseline in DTIS Physical Functioning Domain Score (ITT Population).

FIG. 9 is a flow chart showing the criteria for discontinuation of a participant due to hepatic toxicities in the clinical trial described in Example 2.

DETAILED DESCRIPTION OF THE INVENTION I. Definitions

To facilitate understanding of the disclosure set forth herein, a number of terms are defined below.

Generally, the nomenclature used herein and the laboratory procedures in organic chemistry, medicinal chemistry, and pharmacology described herein are those well-known and commonly employed in the art. Unless defined otherwise, all technical and scientific terms used herein generally have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

In this specification and the appended claims, the singular forms “a,” “an” and “the” include plural referents unless the context clearly dictates otherwise. The terms “a” (or “an”), as well as the terms “one or more,” and “at least one” can be used interchangeably herein. In certain aspects, the term “a” or “an” means “single.” In other aspects, the term “a” or “an” includes “two or more” or “multiple.”

Furthermore, “and/or” where used herein is to be taken as specific disclosure of each of the two specified features or components with or without the other. Thus, the term “and/or” as used in a phrase such as “A and/or B” herein is intended to include “A and B,” “A or B,” “A” (alone), and “B” (alone). Likewise, the term “and/or” as used in a phrase such as “A, B, and/or C” is intended to encompass each of the following aspects: A, B, and C; A, B, or C; A or C; A or B; B or C; A and C; A and B; B and C; A (alone); B (alone); and C (alone).

The term “nirogacestat” refers to the single enantiomer (S)-2-(((S)-6,8-difluoro-1,2,3,4-tetrahydronaphthalen-2-yl)amino)-N-(1-(2-methyl-1-(neopentylamino) propan-2-y1)-1H-imidazol-4-yl)pentanamide. A preferred pharmaceutically acceptable salt of nirogacestat is nirogacestat dihydrobromide (which is also referred to as nirogacestat hydrobromide). All amounts of nirogacestat or its salt for administration are in terms of its free base. For instance, 150 mg nirogacestat dihydrobromide refers to an amount of nirogacestat dihydrobromide which is equivalent to 150 mg nirogacestat free base (that is, approximately, 199.6 mg nirogacestat dihydrobromide).

The term “subject” refers to an animal, including, but not limited to, a primate (e.g., human), cow, sheep, goat, horse, dog, cat, rabbit, rat, or mouse. The terms “subject” and “patient” are used interchangeably herein in reference, for example, to a mammalian subject, such as a human subject.

As used herein, the terms “treat,” “treated,” and “treating” mean both therapeutic treatment and prophylactic or preventative measures wherein the object is to prevent or slow down (lessen) an undesired physiological condition, disorder, or disease, or obtain beneficial or desired clinical results. Thus, those in need of treatment include those already diagnosed with or suspected of having the disorder. Beneficial or desired clinical results include, but are not limited to, alleviation of symptoms; diminishment of the extent of a condition, disorder, or disease; stabilized (i.e., not worsening) state of condition, disorder, or disease; delay in onset or slowing of condition, disorder, or disease progression; amelioration of the condition, disorder, or disease state or remission (whether partial or total), whether detectable or undetectable; an amelioration of at least one measurable physical parameter, not necessarily discernible by the patient; or enhancement or improvement of condition, disorder, or disease. Treatment includes eliciting a clinically significant response without excessive levels of side effects. Treatment also includes prolonging survival as compared to expected survival if not receiving treatment. The term “therapeutically effective amount” is meant to include the amount of a compound that, when administered, is sufficient to prevent development of, or alleviate to some extent, one or more of the symptoms of a disorder, disease, or condition being treated. The term “therapeutically effective amount” also refers to the amount of a compound that is sufficient to elicit the biological or medical response of a cell, tissue, system, animal, or human, which is being sought by a researcher, veterinarian, medical doctor, or clinician.

In certain aspects, a subject is successfully “treated” for cancer, e.g., multiple myeloma, according to the methods of the present invention if the patient shows one or more of the following: a reduction in the number of or complete absence of cancer cells; relief of one or more symptoms associated with the specific cancer; reduced morbidity and mortality; improvement in quality of life; increased progression-free survival (“PFS”), disease-free survival (“DFS”), overall survival (“OS”), metastasis-free survival (“MFS”), complete response (“CR”), minimal residual disease (“MRD”), partial response (“PR”), stable disease (“SD”), a decrease in progressive disease (“PD”), an increased time to progression (“TTP”), or any combination thereof. In some aspects, nationally or internationally accepted standards of treatment outcomes in a given cancer can be used to determine whether the therapeutically effective amount nirogacestat or a pharmaceutically acceptable salt thereof meets any of these particular endpoints (e.g., CR, PFS, PR)

The terms “pharmaceutically acceptable carrier,” “pharmaceutically acceptable excipient,” “physiologically acceptable carrier,” or “physiologically acceptable excipient” refer to a pharmaceutically-acceptable material, composition, or vehicle, such as a liquid or solid filler, diluent, excipient, solvent, or encapsulating material. In one embodiment, each component is “pharmaceutically acceptable” in the sense of being compatible with the other ingredients of a pharmaceutical formulation, and suitable for use in contact with the tissue or organ of humans and animals without excessive toxicity, irritation, allergic response, immunogenicity, or other problems or complications, commensurate with a reasonable benefit/risk ratio. See Remington: The Science and Practice of Pharmacy, 21st Edition, Lippincott Williams & Wilkins: Philadelphia, PA, 2005; Handbook of Pharmaceutical Excipients, 5th Edition, Rowe et al., Eds., The Pharmaceutical Press and the American Pharmaceutical Association: 2005; and Handbook of Pharmaceutical Additives, 3rd Edition, Ash and Ash Eds., Gower Publishing Company: 2007; Pharmaceutical Preformulation and Formulation, Gibson Ed., CRC Press LLC: Boca Raton, FL, 2004 (incorporated herein by reference).

The term “pharmaceutically-acceptable salts” refers to the relatively non-toxic, inorganic and organic acid addition salts of Compound A or Compound B. These salts can be prepared in situ in the administration vehicle or the dosage form manufacturing process, or by separately reacting a purified compound of the invention in its free base form with a suitable organic or inorganic acid, and isolating the salt thus formed during subsequent purification. Representative salts include the hydrobromide, hydrochloride, sulfate, bisulfate, phosphate, nitrate, acetate, valerate, oleate, palmitate, stearate, laurate, benzoate, lactate, phosphate, tosylate, citrate, maleate, fumarate, succinate, tartrate, napthylate, mesylate, glucoheptonate, lactobionate, and laurylsulphonate salts and the like. (See, e.g., Berge et al. (1977) “Pharmaceutical Salts”, J. Pharm. Sci. 66:1-19).

The pharmaceutically acceptable salts of the subject compounds include the conventional nontoxic salts or quaternary ammonium salts of the compounds, e.g., from non-toxic organic or inorganic acids. For example, such conventional nontoxic salts include those derived from inorganic acids such as hydrochloride, hydrobromic, sulfuric, sulfamic, phosphoric, nitric, and the like; and the salts prepared from organic acids such as acetic, propionic, succinic, glycolic, stearic, lactic, malic, tartaric, citric, ascorbic, palmitic, maleic, hydroxymaleic, phenylacetic, glutamic, benzoic, salicyclic, sulfanilic, 2-acetoxybenzoic, fumaric, toluenesulfonic, methanesulfonic, ethane disulfonic, oxalic, isothionic, and the like.

In certain aspects, the compounds of the present invention may contain one or more acidic functional groups and, thus, are capable of forming pharmaceutically acceptable salts with pharmaceutically acceptable bases. The term “pharmaceutically-acceptable salts” in these instances refers to the relatively non-toxic, inorganic and organic base addition salts of compounds of the present invention. These salts can likewise be prepared in situ in the administration vehicle or the dosage form manufacturing process, or by separately reacting the purified compound in its free acid form with a suitable base, such as the hydroxide, carbonate or bicarbonate of a pharmaceutically acceptable metal cation, with ammonia, or with a pharmaceutically acceptable organic primary, secondary or tertiary amine. Representative alkali or alkaline earth salts include the lithium, sodium, potassium, calcium, magnesium, and aluminum salts and the like. Representative organic amines useful for the formation of base addition salts include ethylamine, diethylamine, ethylenediamine, ethanolamine, diethanolamine, piperazine and the like. (See, e.g., B erge et al., supra).

The term “intraabdominal tumor” include those patients having an intraabdominal tumor (including, for instance, in the mesentery or pelvis) as well as those patients with multiple target tumors located in both intraabdominal and extraabdominal locations.

The term “baseline” refers to an initial measurement of a condition that is taken at an early time point and used for comparison over time to look for changes. Baseline may be a measurement just before treatment and used afterwards to see if the treatment had an effect. For example, the size of a tumor can be measured before treatment (baseline) and then afterwards to see if the treatment had an effect.

The terms “about” or “approximately” means an acceptable error for a particular value as determined by one of ordinary skill in the art, which depends in part on how the value is measured or determined. In certain embodiments, the term “about” or “approximately” means within 1, 2, 3, or 4 standard deviations. In certain embodiments, the term “about” or “approximately” means within 50%, 20%, 15%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, or 0.05% of a given value or range.

The term “treatment naïve patient” refers to a patient suffering from a particular disorder or disease (such as desmoid tumor or multiple myeloma) that has not previously undergone treatment for that disorder or disease. In one embodiment, the treatment naïve patient has not previously undergone surgery. In another embodiment, the treatment naïve patient has not been treated with a pharmaceutical agent. In an exemplary embodiment, the treatment naïve patient has not been treated with a tyrosine kinase inhibitor, such as sorafenib.

Unless the context requires otherwise, the terms “comprise,” “comprises,” and “comprising” are used on the basis and clear understanding that they are to be interpreted inclusively, rather than exclusively, and that Applicant intends each of those words to be so interpreted in construing this patent, including the claims below.

II. Compositions

The present disclosure relates to compositions comprising a compound of Formula (I)

-   -   or a pharmaceutically acceptable salt thereof wherein the         composition provides a mean maximum drug plasma concentration         (C_(max)) of more than 100 ng/ml. In some aspects, the         compositions comprising a compound of Formula (I) or a         pharmaceutically acceptable salt thereof provide a mean maximum         drug plasma concentration (C_(max)) of about 150 ng/ml to about         500 ng/ml. In some aspects, the compositions comprising a         compound of Formula (I) or a pharmaceutically acceptable salt         thereof provide a mean maximum drug plasma concentration         (C_(max)) of about 200 ng/ml to about 450 ng/ml. In some         aspects, the compositions comprising a compound of Formula (I)         or a pharmaceutically acceptable salt thereof provide a mean         maximum drug plasma concentration (C_(max)) of about 250 ng/ml         to about 400 ng/ml. In some aspects, the compositions comprising         a compound of Formula (I) or a pharmaceutically acceptable salt         thereof provide a mean maximum drug plasma concentration         (C_(max)) of about 125 ng/ml, about 150 ng/ml, about 175 ng/ml,         about 200 ng/ml, about 225 ng/ml, about 250 ng/ml, about 275         ng/ml, about 300 ng/ml, about 325 ng/ml, about 350 ng/ml, about         375 ng/ml, about 400 ng/l, about 425 ng/ml, about 450 ng/ml,         about 475 ng/ml, or about 500 ng/ml.

In some aspects, the pharmaceutically acceptable salt of the compound of Formula (I) is the hydrobromide salt. In some aspects, the pharmaceutically acceptable salt of the compound of Formula (I) is the dihydrobromide salt.

In some aspects, the compositions comprise a compound of Formula (I) as a dihydrobromide salt form and provide a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml. In some aspects, the compositions comprise a compound of Formula (I) as a dihydrobromide salt form and provide a mean maximum drug plasma concentration (C_(max)) of about 150 ng/ml to about 500 ng/ml. In some aspects, the compositions comprise a compound of Formula (I) as a dihydrobromide salt form and provide a mean maximum drug plasma concentration (C_(max)) of about 200 ng/ml to about 450 ng/ml. In some aspects, the compositions comprise a compound of Formula (I) as a dihydrobromide salt form and provide a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml to about 400 ng/ml. In some aspects, the compositions comprise a compound of Formula (I) as a dihydrobromide salt form and provide a mean maximum drug plasma concentration (C_(max)) of about 125 ng/ml, about 150 ng/ml, about 175 ng/ml, about 200 ng/ml, about 225 ng/ml, about 250 ng/ml, about 275 ng/ml, about 300 ng/ml, about 325 ng/ml, about 350 ng/ml, about 375 ng/ml, about 400 ng/l, about 425 ng/ml, about 450 ng/ml, about 475 ng/ml, or about 500 ng/ml.

The compositions comprising the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) can be administered to subjects via the oral, parenteral (such as subcutaneous, intravenous, intramuscular, intrasternal and infusion techniques), rectal, intranasal, topical or transdermal (e.g., through the use of a patch) routes. In some aspects, the compositions comprising the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) can be administered to subjects orally.

In some aspects, the compositions comprising the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) are in the form of a solid. In one aspect, the compositions comprising the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) are a tablet or capsule.

In some aspects, the compositions comprising the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) can additionally comprise one or more pharmaceutically acceptable excipients. For example, for oral administration, microcrystalline cellulose, sodium citrate, calcium carbonate, dicalcium phosphate and glycine may be employed along with various disintegrants such as starch (preferably corn, potato or tapioca starch), methylcellulose, alginic acid and certain complex silicates, together with granulation binders such as polyvinylpyrrolidone, sucrose, gelatin and acacia, can be included in a tablet. Additionally, lubricating agents such as magnesium stearate, sodium lauryl sulfate and talc are often useful for tabletting purposes. Solid compositions of a similar type may also be employed as fillers in gelatin capsules. Preferred materials in this connection include lactose or milk sugar as well as high molecular weight polyethylene glycols. When aqueous suspensions and/or elixirs are desired for oral administration, the active ingredient may be combined with various sweetening or flavoring agents, coloring matter or dyes, and, if so desired, emulsifying and/or suspending agents as well, together with such diluents as water, ethanol, propylene glycol, glycerin and various like combinations thereof.

In some aspects, the compositions comprising the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) may be administered to a patient in need thereof for the treatment of desmoid tumor or multiple myeloma. The compositions may include amounts of the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) in the range of about, e.g., 25 mg to 350 mg, 50 mg to 325 mg, 75 mg to 300 mg, 100 mg to 275 mg, 125 mg to 250 mg, 150 mg to 225 mg, 175 mg to 200 mg. In some aspects, the compositions comprising the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) may be administered in the range of about, e.g., 50 mg to 300 mg, 100 mg to 250 mg, and 150 mg to 200 mg. The compositions may include amounts of the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) of about, e.g., 25 mg, 50 mg, 75 mg, 100 mg, 125 mg, 150 mg, 175 mg, 200 mg, 225 mg, 250 mg, 275 mg, 300 mg, 325 mg and 350 mg. In some aspects, the compositions may include amounts of the compound of Formula (I) or pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) of about, e.g., 50 mg, 100 mg, 150 mg, 200 mg, 250 mg, 300 mg, and 350 mg. In some aspects, the compositions may be administered once daily. In other aspects, the compositions may be administered twice daily. For example, the compositions may include 50 mg nirogacestat or a pharmaceutically acceptable salt thereof and be administered once daily. In other examples, the compositions may include 50 mg nirogacestat or a pharmaceutically acceptable salt thereof and be administered twice daily. The compositions may include 100 mg nirogacestat or a pharmaceutically acceptable salt thereof and be administered once daily. In other examples, the compositions may include 100 mg nirogacestat or a pharmaceutically acceptable salt thereof and be administered twice daily. In other examples, the compositions may include 150 mg nirogacestat or a pharmaceutically acceptable salt thereof and be administered once daily. In other examples, the compositions may include 150 mg nirogacestat or a pharmaceutically acceptable salt thereof and be administered twice daily.

One embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 50 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject a C_(max) of less than 200 ng/mL (such as less than 190 ng/mL). In one embodiment, the solid pharmaceutical composition provides upon initial oral administration to the human subject a C_(max) of from about 100 to about 200 ng/mL.

Another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 50 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(last) of less than 725 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 200 ng/mL (such as less than 190 ng/mL, or from about 100 to about 200 ng/mL).

Yet another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 50 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(last) of from about 375 to about 725 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 200 ng/mL (such as less than 190 ng/mL, or from about 100 to about 200 ng/mL).

Yet another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 50 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(inf) of less than 725 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 200 ng/mL (such as less than 190 ng/mL, or from about 100 to about 200 ng/mL).

Yet another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 50 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(inf) of from about 375 to about 725 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 200 ng/mL (such as less than 190 ng/mL, or from about 100 to about 200 ng/mL).

One embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 100 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject a C_(max) of less than 600 ng/mL (such as less than 570 ng/mL, or from about 300 to about 570 ng/mL).

Another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 100 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(last) of less than 2300 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 600 ng/mL (such as less than 570 ng/mL, or from about 300 to about 570 ng/mL).

Yet another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 100 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(last) of from about 1200 to about 2300 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 600 ng/mL (such as less than 570 ng/mL, or from about 300 to about 570 ng/mL).

Another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 100 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(inf) of less than 2300 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 600 ng/mL (such as less than 570 ng/mL, or from about 300 to about 570 ng/mL).

Yet another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 100 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(inf) of from about 1200 to about 2300 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 600 ng/mL (such as less than 570 ng/mL, or from about 300 to about 570 ng/mL).

One embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject a C_(max) of less than 1000 ng/mL (such as less than 950 ng/mL, or from about 480 to about 950 ng/mL).

Another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(last) of less than 4000 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 1000 ng/mL (such as less than 950 ng/mL, or from about 480 to about 950 ng/mL).

Yet another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(last) of from about 2000 to about 4000 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 1000 ng/mL (such as less than 950 ng/mL, or from about 480 to about 950 ng/mL).

Another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(inf) of less than 4000 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 1000 ng/mL (such as less than 950 ng/mL, or from about 480 to about 950 ng/mL).

Yet another embodiment is a solid oral pharmaceutical composition (such as a tablet or capsule) containing 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof (such as nirogacestat dihydrobromide) which provides upon initial oral administration to a human subject an AUC_(inf) of from about 2000 to about 4000 ng·h/mL. In one embodiment, the solid oral pharmaceutical composition exhibits upon initial oral administration to the human subject a C_(max) of less than 1000 ng/mL (such as less than 950 ng/mL, or from about 480 to about 950 ng/mL).

III. Methods of Treatment A. Desmoid Tumor

Nirogacestat can be administered to a patient to treat desmoid tumor. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 150 ng/ml to about 500 ng/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprises administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 200 ng/ml to about 500 ng/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml to about 500 ng/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 125 ng/ml, about 150 ng/ml, about 175 ng/ml, about 200 ng/ml, about 225 ng/ml, about 250 ng/ml, about 275 ng/ml, about 300 ng/ml, about 325 ng/ml, about 350 ng/ml, about 375 ng/ml, about 400 ng/l, about 425 ng/ml, about 450 ng/ml, about 475 ng/ml, or about 500 ng/ml.

In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 700 ng·h/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 250 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 300 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml, about 225 ng·h/ml, about 250 ng·h/ml, about 275 ng·h/ml, about 300 ng·h/ml, about 325 ng·h/ml, about 350 ng·h/ml, about 375 ng·h/ml, about 400 ng·h/ml, about 425 ng·h/ml, about 450 ng·h/ml, about 475 ng·h/ml, about 500 ng·h/ml, about 525 ng·h/ml, about 550 ng·h/ml, about 575 g h/ml, about 600 ng·h/ml, about 625 ng·h/ml, or about 675 ng·h/ml.

In some aspects, the methods for treating desmoid tumor comprise administration to a patient in need thereof an oral dosage form comprising 50 mg of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) to a patient in need thereof.

In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 150 ng/ml to about 500 ng/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 200 ng/ml to about 500 ng/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml to about 500 ng/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 125 ng/ml, about 150 ng/ml, about 175 ng/ml, about 200 ng/ml, about 225 ng/ml, about 250 ng/ml, about 275 ng/ml, about 300 ng/ml, about 325 ng/ml, about 350 ng/ml, about 375 ng/ml, about 400 ng/l, about 425 ng/ml, about 450 ng/ml, about 475 ng/ml, or about 500 ng/ml.

In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 700 ng·h/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 250 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 300 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml, about 225 ng·h/ml, about 250 ng·h/ml, about 275 ng·h/ml, about 300 ng·h/ml, about 325 ng·h/ml, about 350 ng·h/ml, about 375 ng·h/ml, about 400 ng·h/ml, about 425 ng·h/ml, about 450 ng·h/ml, about 475 ng·h/ml, about 500 ng·h/ml, about 525 ng·h/ml, about 550 ng·h/ml, about 575 g h/ml, about 600 ng·h/ml, about 625 ng·h/ml, or about 675 ng·h/ml.

In some aspects, the methods for treating desmoid tumor in a patient in need thereof comprise administering to the patient 300 mg per day of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form).

In some aspects, the methods for treating desmoid tumor comprise orally administering the nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form). In some aspects, the methods for treating desmoid tumor comprise orally administering the nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) as a solid dosage form. In some aspects, the solid dosage forms are tablets or capsules.

In some aspects, the methods for treating desmoid tumor comprise administering the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) once daily. In some aspects, the methods for treating desmoid tumor comprise administering the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) two, three, or four times daily. If the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) is administered more than one times daily, the total daily dose administered each time can be the same or different. For example, if 300 mg nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) is to be administered two times daily, the patient could receive either two 150 mg doses (e.g., one 150 mg dose at 8 am and one 150 mg dose at 8 pm) or a 100 mg dose in the morning and a 200 mg dose in the evening. Each dose can also consist of more than one solid dosage form. For example, a 150 mg individual dose (i.e., the morning dose of a 300 mg total daily dose to be administered as two separate doses) could be administered as three 50 mg tablets.

In one embodiment, the patient having desmoid tumor is treated with 150 mg nirogacestat twice daily (for a total daily dose of 300 mg nirogacestat). In a preferred embodiment, the nirogacestat is administered in the form of its dihydrobromide salt. In one preferred embodiment, the dose is modified upon due to adverse reactions as follows:

In one embodiment, the dose is modified for selected severe adverse reactions as described in Table 1 below. All adverse reactions or events are graded according to the U.S. National Cancer Institute's Common Terminology Criteria for Adverse Events (CTCAE), version 5.0, which is hereby incorporated by reference. For adverse events (or adverse reactions) or severe adverse events not listed in the CTCAE, the following grading system was used: Grade 1 refers to mild; asymptomatic or mild symptoms; clinical or diagnostic observations only; treatment not indicated. Grade 3 refer to severe or medically significant but not immediately life-threatening; hospitalization or prolongation of hospitalization indicated; disabling; limiting self-care activities of daily living. Self-care activities of daily living refers to bathing, dressing and undressing, feeding self, using the toilet, taking medications, and not bedridden.

TABLE 1 Dose Modifications for Adverse Reactions Adverse Reaction Intervention Diarrhea Grade 3 diarrhea persisting for ≥3 days despite Withhold drug (nirogacestat or a pharmaceutically maximal medical therapy acceptable salt thereof) until resolved to Grade ≤1 or baseline, then restart at a dose of 100 mg twice daily. Skin Reactions Grade 3 folliculitis Withhold drug until resolved to Grade ≤1 or baseline, then restart at a dose of 100 mg twice daily. Grade 3 maculopapular rash Withhold drug until resolved to Grade ≤1 or baseline, then restart at a dose of 100 mg twice daily. Grade 3 hidradenitis Withhold drug until resolved to Grade ≤1 or baseline, then restart at a dose of 100 mg twice daily. Electrolyte Abnormalities Grade 3 hypophosphatemia persisting for ≥7 days Withhold drug until resolved to Grade ≤1 or despite maximal replacement therapy baseline, then restart at a dose of 100 mg twice daily. Grade 3 hypokalemia despite maximal Withhold drug until resolved to Grade ≤1 or replacement therapy baseline, then restart at a dose of 100 mg twice daily. Elevated Liver Transaminases ALT or AST ≥ 3 to 5 × ULN Withhold drug until ALT, AST, or both are resolved to <3 × ULN or baseline, then restart at a dose of 100 mg twice daily ALT or AST > 5 × ULN Permanently discontinue Other Adverse Reactions Anaphylaxis or other severe hypersensitivity Permanently discontinue reaction

In a further embodiment, for severe adverse reactions other than those in Table 1, or in the event of life-threatening adverse reactions, the nirogacestat is withheld until the reaction is resolved to Grade≤1 or baseline. Treatment with nirogacestat may be restarted at a dose of 100 mg twice daily after consideration of the potential benefit and likelihood of recurrence of the adverse reaction. Nirogacestat is permanently discontinued upon recurrence of a severe or life-threatening adverse reaction upon rechallenge at the reduced dose (i.e., 100 mg twice daily).

B. Multiple Myeloma

Nirogacestat can also be administered to a patient to treat multiple myeloma.

In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 150 ng/ml to about 500 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 200 ng/ml to about 500 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml to about 500 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 125 ng/ml, about 150 ng/ml, about 175 ng/ml, about 200 ng/ml, about 225 ng/ml, about 250 ng/ml, about 275 ng/ml, about 300 ng/ml, about 325 ng/ml, about 350 ng/ml, about 375 ng/ml, about 400 ng/l, about 425 ng/ml, about 450 ng/ml, about 475 ng/ml, or about 500 ng/ml.

In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 225 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml to about 750 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 300 ng/ml to about 750 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 350 ng/ml to about 750 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml, about 275 ng/ml, about 300 ng/ml, about 325 ng/ml, about 350 ng/ml, about 375 ng/ml, about 400 ng/ml, about 425 ng/ml, about 450 ng/ml, about 475 ng/ml, about 500 ng/ml, about 525 ng/l, about 550 ng/ml, about 575 ng/ml, about 600 ng/ml, about 625 ng/ml, about 650 ng/ml, about 675 ng/ml, about 700 ng/ml, about 725 ng/ml, or about 750 ng/ml.

In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 700 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 250 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 300 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml, about 225 ng·h/ml, about 250 ng·h/ml, about 275 ng·h/ml, about 300 ng·h/ml, about 325 ng·h/ml, about 350 ng·h/ml, about 375 ng·h/ml, about 400 ng·h/ml, about 425 ng·h/ml, about 450 ng·h/ml, about 475 ng·h/ml, about 500 ng·h/ml, about 525 ng·h/ml, about 550 ng·h/ml, about 575 g h/ml, about 600 ng·h/ml, about 625 ng·h/ml, or about 675 ng·h/ml.

In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 3000 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 250 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 300 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 350 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 400 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 450 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 500 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 550 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 600 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 650 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 700 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 750 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 800 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 850 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 900 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 950 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1000 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1050 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1100 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1150 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1200 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1250 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1350 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1400 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1450 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1500 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1550 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1600 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1650 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1700 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1750 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1800 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1850 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1900 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1950 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2000 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2050 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2100 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2150 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2200 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2250 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2300 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2350 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2400 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2450 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2500 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2550 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2600 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2650 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2700 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2750 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml, about 225 ng·h/ml, about 250 ng·h/ml, about 275 ng·h/ml, about 300 ng·h/ml, about 325 ng·h/ml, about 350 ng·h/ml, about 375 ng·h/ml, about 400 ng·h/ml, about 425 ng·h/ml, about 450 ng·h/ml, about 475 ng·h/ml, about 500 ng·h/ml, about 525 ng·h/ml, about 550 ng·h/ml, about 575 g h/ml, about 600 ng·h/ml, about 625 ng·h/ml, about 675 ng·h/ml, about 700 ng·h/ml, about 725 ng·h/ml, about 750 ng·h/ml, about 775 ng·h/ml, about 800 ng·h/ml, about 825 ng·h/ml, about 850 ng·h/ml, about 875 ng·h/ml, about 900 ng·h/ml, about 925 ng·h/ml, about 950 ng·h/ml, about 975 ng·h/ml, about 1000 ng·h/ml, about 1025 ng·h/ml, about 1050 ng·h/ml, about 1075 ng·h/ml, about 1100 ng·h/ml, about 1125 ng·h/ml, about 1150 ng·h/ml, about 1175 ng·h/ml, about 1200 ng·h/ml, about 1225 ng·h/ml, about 1250 ng·h/ml, about 1275 ng·h/ml, about 1300 ng·h/ml, about 1325 ng·h/ml, about 1350 ng·h/ml, about 1375 ng·h/ml, about 1400 ng·h/ml, about 1425 ng·h/ml, about 1450 ng·h/ml, about 1475 ng·h/ml, about 1500 ng·h/ml, about 1525 ng·h/ml, about 1550 ng·h/ml, about 1575 ng·h/ml, about 1600 ng·h/ml, about 1625 ng·h/ml, about 1650 ng·h/ml, about 1675 ng·h/ml, about 1700 ng·h/ml, about 1725 ng·h/ml, about 1750 ng·h/ml, about 1775 ng·h/ml, about 1800 ng·h/ml, about 1825 ng·h/ml, about 1850 ng·h/ml, about 1875 ng·h/ml, about 1900 ng·h/ml, about 1925 ng·h/ml, about 1950 ng·h/ml, about 2000 ng·h/ml, about 2025 ng·h/ml, about 2050 ng·h/ml, about 2100 ng·h/ml, about 2125 ng·h/ml, about 2150 ng·h/ml, about 2175 ng·h/ml, about 2200 ng·h/ml, about 2225 ng·h/ml, about 2250 ng·h/ml, about 2275 ng·h/ml, about 2300 ng·h/ml, about 2325 ng·h/ml, about 2550 ng·h/ml, about 2575 ng·h/ml, about 2600 ng·h/ml, about 2625 ng·h/ml, about 2650 ng·h/ml, about 2675 ng·h/ml, about 2700 ng·h/ml, about 2725 ng·h/ml, about 2750 ng·h/ml, about 2775 ng·h/ml, about 2800 ng·h/ml, about 2825 ng·h/ml, about 2850 ng·h/ml, about 2875 ng·h/ml, about 2900 ng·h/ml, about 2925 ng·h/ml, or about 2950 ng·h/ml.

In some aspects, the methods for treating multiple myeloma comprise administration to a patient in need thereof 200 mg per day of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form). For example, the method may include administering 100 mg twice daily of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form). In some aspects, the methods for treating multiple myeloma comprise administration to a patient in need thereof 100 mg per day of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form). In some aspects, the methods for treating multiple myeloma comprise administration to a patient in need thereof 100 mg per day of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form). In some aspects, the methods for treating multiple myeloma comprise administration to a patient in need thereof 50 mg per day of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form)

In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 100 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 150 ng/ml to about 500 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 200 ng/ml to about 500 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml to about 500 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 125 ng/ml, about 150 ng/ml, about 175 ng/ml, about 200 ng/ml, about 225 ng/ml, about 250 ng/ml, about 275 ng/ml, about 300 ng/ml, about 325 ng/ml, about 350 ng/ml, about 375 ng/ml, about 400 ng/l, about 425 ng/ml, about 450 ng/ml, about 475 ng/ml, or about 500 ng/ml.

In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of more than 225 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml to about 750 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 300 ng/ml to about 750 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 350 ng/ml to about 750 ng/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., dihydrobromide salt form) wherein the oral dosage provides a mean maximum drug plasma concentration (C_(max)) of about 250 ng/ml, about 275 ng/ml, about 300 ng/ml, about 325 ng/ml, about 350 ng/ml, about 375 ng/ml, about 400 ng/ml, about 425 ng/ml, about 450 ng/ml, about 475 ng/ml, about 500 ng/ml, about 525 ng/l, about 550 ng/ml, about 575 ng/ml, about 600 ng/ml, about 625 ng/ml, about 650 ng/ml, about 675 ng/ml, about 700 ng/ml, about 725 ng/ml, or about 750 ng/ml.

In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 700 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/m1 to about 650 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 250 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 300 ng·h/ml to about 650 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 50 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml, about 225 ng·h/ml, about 250 ng·h/ml, about 275 ng·h/ml, about 300 ng·h/ml, about 325 ng·h/ml, about 350 ng·h/ml, about 375 ng·h/ml, about 400 ng·h/ml, about 425 ng·h/ml, about 450 ng·h/ml, about 475 ng·h/ml, about 500 ng·h/ml, about 525 ng·h/ml, about 550 ng·h/ml, about 575 g h/ml, about 600 ng·h/ml, about 625 ng·h/ml, or about 675 ng·h/ml.

In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of less than 3000 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 250 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 300 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 350 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 400 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 450 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 500 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 550 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 600 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 650 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 700 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 750 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 800 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 850 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 900 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 950 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1000 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1050 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1100 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1150 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1200 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1250 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1350 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1400 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1450 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1500 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1550 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1600 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1650 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1700 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1750 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1800 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1850 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1900 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 1950 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2000 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2050 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2100 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2150 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2200 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2250 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2300 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2350 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2400 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2450 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2500 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2550 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2600 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2650 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2700 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 2750 ng·h/ml to about 2950 ng·h/ml. In some aspects, the methods for treating multiple myeloma in a patient in need thereof comprise administering to the patient a 100 mg oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) wherein the oral dosage provides an in vivo area under the plasma curve (AUC_(inf)) of about 200 ng·h/ml, about 225 ng·h/ml, about 250 ng·h/ml, about 275 ng·h/ml, about 300 ng·h/ml, about 325 ng·h/ml, about 350 ng·h/ml, about 375 ng·h/ml, about 400 ng·h/ml, about 425 ng·h/ml, about 450 ng·h/ml, about 475 ng·h/ml, about 500 ng·h/ml, about 525 ng·h/ml, about 550 ng·h/ml, about 575 g h/ml, about 600 ng·h/ml, about 625 ng·h/ml, about 675 ng·h/ml, about 700 ng·h/ml, about 725 ng·h/ml, about 750 ng·h/ml, about 775 ng·h/ml, about 800 ng·h/ml, about 825 ng·h/ml, about 850 ng·h/ml, about 875 ng·h/ml, about 900 ng·h/ml, about 925 ng·h/ml, about 950 ng·h/ml, about 975 ng·h/ml, about 1000 ng·h/ml, about 1025 ng·h/ml, about 1050 ng·h/ml, about 1075 ng·h/ml, about 1100 ng·h/ml, about 1125 ng·h/ml, about 1150 ng·h/ml, about 1175 ng·h/ml, about 1200 ng·h/ml, about 1225 ng·h/ml, about 1250 ng·h/ml, about 1275 ng·h/ml, about 1300 ng·h/ml, about 1325 ng·h/ml, about 1350 ng·h/ml, about 1375 ng·h/ml, about 1400 ng·h/ml, about 1425 ng·h/ml, about 1450 ng·h/ml, about 1475 ng·h/ml, about 1500 ng·h/ml, about 1525 ng·h/ml, about 1550 ng·h/ml, about 1575 ng·h/ml, about 1600 ng·h/ml, about 1625 ng·h/ml, about 1650 ng·h/ml, about 1675 ng·h/ml, about 1700 ng·h/ml, about 1725 ng·h/ml, about 1750 ng·h/ml, about 1775 ng·h/ml, about 1800 ng·h/ml, about 1825 ng·h/ml, about 1850 ng·h/ml, about 1875 ng·h/ml, about 1900 ng·h/ml, about 1925 ng·h/ml, about 1950 ng·h/ml, about 2000 ng·h/ml, about 2025 ng·h/ml, about 2050 ng·h/ml, about 2100 ng·h/ml, about 2125 ng·h/ml, about 2150 ng·h/ml, about 2175 ng·h/ml, about 2200 ng·h/ml, about 2225 ng·h/ml, about 2250 ng·h/ml, about 2275 ng·h/ml, about 2300 ng·h/ml, about 2325 ng·h/ml, about 2550 ng·h/ml, about 2575 ng·h/ml, about 2600 ng·h/ml, about 2625 ng·h/ml, about 2650 ng·h/ml, about 2675 ng·h/ml, about 2700 ng·h/ml, about 2725 ng·h/ml, about 2750 ng·h/ml, about 2775 ng·h/ml, about 2800 ng·h/ml, about 2825 ng·h/ml, about 2850 ng·h/ml, about 2875 ng·h/ml, about 2900 ng·h/ml, about 2925 ng·h/ml, or about 2950 ng·h/ml.

In some aspects, the methods for treating multiple myeloma comprise orally administering the nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form). In some aspects, the methods for treating multiple myeloma comprise orally administering the nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) as a solid dosage form. In some aspects, the solid dosage form is a tablet or capsule.

In some aspects, the methods for treating multiple myeloma comprise administering nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) once daily. In some aspects, the methods for treating multiple myeloma comprise administering nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) twice daily. In some aspects, the methods for treating multiple myeloma comprise administering the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) two, three, or four times daily. If the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) is administered more than one times daily, the total daily dose administered each time can be the same or different. For example, if 100 mg nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) is to be administered two times daily, the patient could receive either two 50 mg doses (e.g., one 50 mg dose at 8 am and one 50 mg dose at 8 pm) or a 25 mg dose in the morning and a 75 mg dose in the evening. Each dose can also consist of more than one solid dosage form. For example, a 50 mg individual dose (i.e., the morning dose of a 100 mg total daily dose to be administered as two separate doses) could be administered as two 25 mg tablets.

In some aspects, the methods for treating multiple myeloma comprise administering a single oral dosage of nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) for the concomitant treatment of multiple myeloma. In a concomitant therapy for treatment of multiple myeloma, the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) is administered with one or more additional active ingredients. In some aspects, the concomitant therapy for the treatment of multiple myeloma comprises administering the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) in combination with BCMA-therapy. In some aspects, the BCMA-directed therapy includes one or more of an allogeneic chimeric antigen receptor T cell therapy, an autologous chimeric antigen receptor T cell therapy, an immunotherapy (e.g., a monoclonal antibody therapy), an antibody drug conjugate therapy, or a bispecific antibody therapy with dual specificity for BCMA and an immune-related target (e.g., CD3). In other aspects, the BCMA-directed therapy includes at least an allogeneic chimeric antigen receptor T cell therapy. In other aspects, the BCMA-directed therapy includes at least an autologous chimeric antigen receptor T cell therapy. In another aspect, the BCMA-directed therapy includes at least an immunotherapy (e.g., a monoclonal antibody therapy). In other aspects, the BCMA-directed therapy includes at least an antibody drug conjugate therapy. In other aspects, the BCMA-directed therapy includes at least a bispecific antibody therapy with dual specificity for BCMA and an immune-related target (e.g., CD3). In some aspects, the methods for treating multiple myeloma comprise administering to the patient an oral dosage of nirogacestat or a pharmaceutically acceptable salt thereof in combination with belantamab mafodotin.

In the concomitant therapy (e.g., in combination with belantamab mafodotin) for treatment of multiple myeloma, the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) is administered to the subject before, simultaneously, or subsequently to the other active ingredient(s) (e.g., belantamab mafodotin).

In some aspects, treating multiple myeloma comprises administering the concomitant therapy of nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) and other active ingredient(s) (e.g., belantamab mafodotin) as a first line therapy. In such aspect, the patient having, multiple myeloma can have previously received and/or be currently being treated for one or more unrelated diseases or disorders (e.g., anxiety).

In some aspects, treating multiple myeloma comprises administering nirogacestat or a pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) and a BCMA-directed therapy (e.g., belantamab mafodotin) to a patient that has been previously treated for the multiple myeloma. In some aspects, the patient with multiple myeloma has been previously treated for the multiple myeloma with one or more of a proteasome inhibitor, an immunomodulatory therapy, an immunotherapy (e.g., a monoclonal antibody, such as a monoclonal antibody directed to CD38), a stem cell transplant, a chemotherapy, a targeted therapy (e.g., an XPO1 inhibitor), or a BCMA-directed therapy not in combination with nirogacestat.

In one aspect, the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) is administered orally and the BCMA-directed therapy (e.g., belantamab mafodotin) is administered intravenously or subcutaneously to the subject.

In some aspects, the patient with multiple myeloma exhibits a complete response following administration of the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) and BCMA-directed therapy (e.g., belantamab mafodotin). In some aspects, the patient with multiple myeloma exhibits a near complete response following administration of the nirogacestat or pharmaceutically acceptable salt thereof and BCMA-directed therapy (e.g., belantamab mafodotin). In some aspects, the patient with multiple myeloma exhibits a stringent complete response following administration of the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) and BCMA-directed therapy (e.g., belantamab mafodotin). In some aspects, the patient with multiple myeloma exhibits a minor response following administration of the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) and BCMA-directed therapy (e.g., belantamab mafodotin). In some aspects, the patient with multiple myeloma exhibits a partial response following administration of the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) and BCMA-directed therapy (e.g., belantamab mafodotin). In some aspects, the patient with multiple myeloma exhibits a very good partial response following administration of the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) and BCMA-directed therapy (e.g., belantamab mafodotin). In some aspects, the patient with multiple myeloma exhibits stable disease following administration of the nirogacestat or pharmaceutically acceptable salt thereof (e.g., a dihydrobromide salt form) and BCMA-directed therapy (e.g., belantamab mafodotin).

EXAMPLES Example 1: Pharmacokinetics

The pharmacokinetic parameters for single oral doses of nirogacestat dihydrobromide (PF-03084014) are provided in Tables 2A-2D below.

TABLE 2A COHORT 1: 150 mg (3 × 50 mg) Period 1 Geometric Geometric Statistic N Min Median Max Mean CV % Half-life (h) 10 18.1 26.3 32.0 25.0 18.6 T_(max) (h) 10 1.00 1.49 2.00 1.34 23.8 C_(max) (ng/mL) 10 547 697 1120 733 25.2 AUC_(last) (h*ng/mL) 10 2080 2580 4660 2960 33.0 AUC_(inf) (h*ng/mL) 10 2160 2640 4870 3050 33.4 Vz/F (L) 10 1060 1830 3210 1770 38.5 CL/F (L/h) 10 30.8 57.0 69.5 49.2 33.4

TABLE 2B COHORT 1: 150 mg (1 × 150 mg) Period 2 Geo- Geo- metric metric Statistic N Min Median Max Mean CV % Half-life (h) 10 13.3 26.3 34.7 24.7 28.1 T_(max) (h) 10 0.500 1.50 1.52 1.20 37.2 C_(max) (ng/mL) 10 456 662 1200 686 30.5 AUC_(last) (h*ng/mL) 10 1790 3040 5720 2930 34.5 AUC_(inf) (h*ng/mL) 10 1830 3100 5880 3020 34.3 Vz/F (L) 10 864 1720 3090 1770 49.2 CL/F (L/h) 10 25.5 48.4 82.0 49.7 34.3

TABLE 2C COHORT 2: 100 mg Period 1 Geo- Geo- metric metric Statistic N Min Median Max Mean CV % Half-life (h) 8 19.7 24.4 34.6 25.2 21.6 T_(max) (h) 8 0.500 1.28 2.00 1.19 44.6 C_(max) (ng/mL) 8 259 433 654 435 33.2 AUC_(last) (h*ng/mL) 8 777 1660 3710 1720 52.0 AUC_(inf) (h*ng/mL) 8 805 1710 3940 1780 52.4 Vz/F (L) 8 1000 2040 3880 2040 51.7 CL/F (L/h) 8 25.4 58.4 124 56.1 52.4

TABLE 2D COHORT 3: 50 mg Period 1 Geometric Geometric Statistic N Min Median Max Mean CV% Half-life (h) 8 4.24 23.3 32.8 19.3 73 T_(max) (h) 8 0.5 1 1.52 0.829 43.4 C_(max) (ng/mL) 8 49.6 209 507 183 82.9 AUC_(last) (h*ng/mL) 8 71.6 653 2120 545 140 AUC_(inf) (h*ng/mL) 8 75.7 674 2140 571 137.36 Vz/F (L) 8 677 2730 5060 2440 67.3 CL/F (L/h) 8 23.4 74.9 660 87.6 137

The pharmacokinetic parameters for oral doses of 150 mg (free base equivalent dose) nirogacestat dihydrobromide twice daily at steady state exposure is provided in Table 2E below.

TABLE 2E Pharmacokinetics for 150 mg (free base equivalent dose) nirogacestat dihydrobromide twice daily at steady state exposure (% CV) C_(max) (% CV) 1246 (79) ng/ml AUC_(tau) (% CV) 6430 (89) ng · h/mL Time to steady-state Approximately 8 days

Example 2: Randomized, Double-Blind, Placebo-Controlled, Phase 3 Trial of Nirogacestat Versus Placebo in Adult Patients with Progressing Desmoid Tumors/Aggressive Fibromatosis (DT/AF)

A Phase 3, double-blind, placebo-controlled study is being conducted to determine the efficacy and safety of nirogacestat dihydrobromide in participants with progressing desmoid tumors. A Phase 1 solid tumor study provided preliminary efficacy (Messersmith, W., et al., “A Phase I, dose-finding study in patients with advanced solid malignancies of the oral γ-secretase inhibitor PF-03084014,” Clin. Cancer Res., 21:60-7 (2015)), including long-term durable responses and safety of nirogacestat in desmoid participants (Villalobos, V. M., et al., “Long-Term Follow-Up of Desmoid Fibromatosis Treated with PF-03084014, an Oral Gamma Secretase Inhibitor, Ann. Surg. Oncol., 25:768-75 (2018)). These encouraging results lead to a Phase 2 study in participants with progressing desmoid tumors (Kummar, S., et al., “Clinical Activity of the γ-Secretase Inhibitor PF-03084014 in Adults with Desmoid Tumors (Aggressive Fibromatosis), J. Clin. Oncol., 35:1561-69 (2017)). This study demonstrated that nirogacestat resulted in a 29% response rate, significant tumor shrinkage as measured by magnetic resonance imaging (MRI) and no participants progressing while on therapy. Importantly, participants in the responder group had failed previous systemic therapies (imatinib or sorafenib) indicating a need for alterative therapeutic options for this patient population. These results support the further study of nirogacestat in this population.

The Objectives and Endpoints are provided in Table 3.

TABLE 3 Key Objectives Key Endpoints Primary Primary To determine the efficacy (as defined by PFS defined as the time from randomization progression free survival (“PFS”)) of until the date of assessment of progression or nirogacestat in adult participants with death by any cause will be determined using progressing desmoid tumor (“DT”)/aggressive Response Evaluation Criteria In Solid Tumors fibramotisis (“AF”). (RECIST) version (v)1.1 (Eisenhauer, E.A., “New response evaluation criteria in solid tumours: revised RECIST guideline (version 1.1), Eur. J. Cancer, 45: 228-47 (2009). The documented date of progression will be determined by an independent, blinded, central radiologic review. Secondary Secondary To evaluate the safety and tolerability of Safety endpoints will include incidence of nirogacestat in adult participants with treatment-emergent AEs, changes in laboratory progressing DT/AF as measured by the parameters, vital signs, physical examination incidence of adverse events (AEs); findings, and electrocardiograms (ECGs). Tolerability will be assessed according to toxicities graded by National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) v5.0; To determine the overall response rate Overall response rate, defined as the proportion (complete response (“CR”) + partial response of participants with CR + PR assessed by (“PR”) of nirogacestat in participants with RECIST v1.1 criteria; progressing DT/AF; To determine the duration of response; Duration of response for participants whose best response is CR or PR; To compare tumor volume changes measured Change in tumor volume from baseline as by MRI in participants with progressing assessed by MRI volumetric; and DT/AF; and To evaluate desmoid tumor symptoms and Symptoms and impacts will be assessed by impacts using patient-reported outcomes evaluating change from baseline on the (PROs). desmoid-specific PRO assessment, MD Anderson symptom inventory (MDASI), and brief pain inventory (BPI) short form.

Overall Design: The Phase 3 study will be a multi-center, randomized, double-blind, placebo-controlled, event-driven to compare the efficacy, safety, and tolerability of nirogacestat and placebo in adult participants with progressing DT/AF. This study will consist of 2 phases, a double-blind and an optional open-label extension (OLE) phase.

Following disease progression (confirmed by central review using RECIST v1.1), or completion of the double-blind phase (once the required number of events have been observed and the primary PFS analysis has been completed), participants' treatment assignment will be unblinded, and if eligible, participants will have the option to enroll in the optional OLE phase.

Type of Participant and Disease Characteristics

-   -   1. Participant has DT/AF that has progressed by ≥20% as measured         by RECIST v1.1 within the 12-month period prior to first dose of         study treatment.     -   2. Participant has:         -   a. Newly diagnosed, measurable progressing DT/AF that is not             amenable to surgical resection or radiation therapy;             -   OR         -   b. Recurrent, progressing DT/AF following CR to initial             therapy;             -   OR         -   c. Preexisting DT/AF and has previously received therapy and             the residual tumor has progressed.     -   3. Participant agrees to provide archival or new tumor tissue         for confirmation of disease.     -   4. If participant was previously treated with an investigational         therapy for treatment of DT/AF, participant must have completed         prior therapy at least 28 days prior to signing informed         consent. All toxicities from prior therapy must resolve to         ≤Grade 1 or baseline.     -   5. Participants who are receiving nonsteroidal anti-inflammatory         drugs (NSAIDs) as treatment for conditions other than DT/AF must         be receiving them prior to the observed progression (inclusion         criteria 1) for:         -   a. Chronic scheduled daily use (defined as stable for 28             days prior to signing informed consent); or         -   b. Occasional use (defined as ≤3 days per week) for the             treatment of pain or as an anti-inflammatory in licensed             conditions such as headache, arthritis, etc.         -   c. Participant has an Eastern Cooperative Oncology Group             (ECOG) performance status at screening.     -   6. Participant has adequate organ and bone marrow function as         defined by the following Screening laboratory values:         -   a. Absolute neutrophil count≥1500/μL;         -   b. Platelets≥100×103/μL;         -   c. Hemoglobin≥9 g/dL;         -   d. Total bilirubin≤1.5× upper limit of normal (ULN)             (isolated bilirubin>1.5×ULN is acceptable if bilirubin is             fractionated and direct bilirubin<35%);         -   e. Aspartate aminotransferase (AST) (serum glutamic             oxaloacetic transaminase)/alanine aminotransferase (ALT)             (serum glutamic pyruvate transaminase)≤2×ULN; and         -   f. Creatinine≤1.5×ULN or if creatinine>1.5×ULN then             calculated creatinine clearance should be ≥60 mL/min/1.73 m²             (using the Cockcroft-Gault formula);         -   g. Participant can swallow tablets and has no             gastrointestinal conditions affecting absorption.

The Schema for this Phase 3 clinical trial is provided in FIG. 1 .

Study Treatment

Participants received either (1) three 50 mg nirogacestat tablets twice daily (i.e., 150 mg nirogacestat twice daily for a total daily dose of 300 mg nirogacestat) or (2) three placebo tablets twice daily. The nirogacestat in the tablets was in the form of its dihydrobromide salt.

Because inhibition of CYP3A4 isoenzymes may increase nirogacestat exposure leading to potential increases in toxicities, the use of known strong/moderate CYP3A4 inhibitors was not allowed. Nirogacestat metabolism may be induced when taking strong CYP3A4 inducers resulting in reduced plasma concentrations. Therefore, co-administration of nirogacestat in combination with strong CYP3A4 inducers was not allowed.

Co-administration of gastric acid reducing agents such as proton pump inhibitors (e.g., omeprazole, esomeprazole, and lansoprazole) may reduce the absorption of nirogacestat. These drugs should be avoided if possible or, when necessary, administered 2 to 4 hours following the morning dose of study treatment.

The dose was modified or interrupted as described in the table below.

Dose Modifications or Interruptions for Selected Toxicities Toxicity (NCI CTCAE)¹ Intervention Gastrointestinal Toxicities Grade ≥3 diarrhea persisting for ≥3 days despite Decrease dose to 100 mg BID maximal medical therapy Grade ≥3 nausea persisting for ≥3 days despite Decrease dose to 100 mg BID maximal medical therapy Grade ≥3 vomiting persisting for ≥3 days despite Decrease dose to 100 mg BID maximal medical therapy Reproductive system toxicities Grade ≥2 premature menopause/primary Decrease dose to 100 mg BID² ovarian insufficiency Other toxicities Grade ≥3 skin toxicity Decrease dose to 100 mg BID Grade ≥3 hypophosphatemia persisting for ≥7 Decrease dose to 100 mg BID days despite maximal replacement therapy and in the absence of symptoms Any clinically significant Grade ≥3 non- Decrease dose to 100 mg BID hematological toxicities Grade ≥3 hematological toxicities Decrease dose to 100 mg BID. Anaphylaxis Permanently discontinue Grade ≥3 hypersensitivity reaction Permanently discontinue Hepatic toxicities Discountinuation of study treatment for abnormal liver function should be considered by the investigator when a participant meets one of the conditions outlined in FIG. 9. ¹NCI CTCAE refers to the National Cancer Institute's Common Terminology Criteria for Adverse Events, version 5.0. ²A dose reduction is not required for events of premature menopause/primary ovarian insufficiency but may be considered for symptomatic participants based on the individual benefit/risk profile. A dose interruption is not required prior to a dose reduction for reproductive system toxicities.

The most frequent adverse reactions requiring a dose reduction or interruption were diarrhea, rash maculo-papular, hypophosphatemia, stomatitis, folliculitis, and fatigue.

The trial met its primary endpoint of improving progression-free survival (PFS)-demonstrating a highly statistically and clinically significant improvement for nirogacestat over placebo, with a meaningful reduction in the risk of disease progression (p<0.001, hazard ratio (HR)=0.29). In addition to achieving the primary endpoint, the trial also met all key secondary endpoints, with nirogacestat demonstrating statistically significant improvements in objective response rate (ORR) and four different quality of life (QoL) assessments and patient-reported outcomes (PROs) (p<0.001 for each). Data is provided in FIGS. 3-8 . A description of the clinical study and the results is also provided in Gounder et al., N Engl J Med 2023, 388:898-912 (DOI: 10.1056/NEJMoa2210140), which is hereby incorporated by reference in its entirety.

The primary outcome measure was the number of progression-free survival events as defined as the time from randomization until date of assessment of progression or death. Key secondary and exploratory measures included Incidence of adverse events according to toxicities graded by National Cancer Institute Common Terminology Criteria for Adverse Events; ORR using RECIST 1.1 criteria; DOR for participants whose best response is CR or PR (not in testing·hierarchy); Tumor volume changes from baseline as measured by MRI volumetric (exploratory). PRO assessments included Gounder/Desmoid Tumor Research Tumor Foundation (DTRF) Desmoid Symptom Scale (GODDESS) (Time frame: daily for the last 7 days of every cycle [28 days/cycle] through study completion); BPI short form (daily for the last 7 days of every cycle); PROMIS PF short form+3 additional items^(a) (last day of every cycle); and EORTC QLQ-C30 (last day of every cycle)

Table 4 provides the mean change from Baseline in EORTC.

TABLE 4 Nirogacestat Placebo Difference Global health status/ 4.493 −6.021 10.515 Quality of life (GHS/QoL) (2.8321) (3.2065) P: 0.007 QLQC30 8.523 −4.631 13.154 Physical Functioning (1.7808) (1.9216) P: <0.001 QLQ30 11.133 −5.581 16.714 Role Functioning (3.1495) (3.4424) P: <0.001 Note: A positive change from the baseline value indicates improvement of symptoms and a negative change from the baseline value indicates worsening of symptoms. A positive least square (LS) mean difference (between nirogacestat and placebo) favors nirogacestat over placebo.

Example 3: A Placebo-Controlled, Phase 3 Trial of Nirogacestat in Adults with Symptomatic Desmoid Tumors/Aggressive Fibromatosis (DT/AF)

A Phase 3 study that is a multi-center, randomized, double-blind, placebo-controlled, to compare the efficacy, safety, and tolerability of nirogacestat and placebo in adult participants with uncontrolled pain due to DT/AF will be conducted. This study will consist of 2 phases, a double-blind and an optional open-label extension (OLE) phase for eligible participants.

Participants will be screened up to 28 days prior to the first dose of study treatment and eligibility will be based on the inclusion and exclusion criteria. During the screening period, potential participants will also be screened for their willingness to keep a daily diary to record their pain and medication use for 12 weeks.

During the screening period, participants are required to keep daily records of pain and analgesic use, to be used to calculate their weekly Average Pain Intensity (API) and Average Analgesic Use (AAU). Only participants who have uncontrolled tumor-related pain defined by an API>4 for a minimum of two consecutive weeks will be randomized onto the study.

Eligible participants will be randomized (1:1) to receive study treatment (nirogacestat or placebo) following all pre-randomization/pre-dose assessments at Cycle 1 Day 1. After receiving the first dose of study treatment, the participant will return to the clinic for scheduled study visits at Cycle 1 (Day 15), Cycle 2 (Day 1 and 15), Cycle 3 (Day 1 and 15), End of Study (EOS) (14 days after Cycle 3 Day 15) and Follow-up (30 days after the last dose of study treatment, if participant does not enter the OLE phase).

During the 12-week study treatment period participants will be required to record their daily pain score, analgesic use, and study treatment dosing in an electronic device (eDiary). Daily reminders will be conducted via electronic means and/or telephone to ensure the strict compliance of data collection procedures on pain and medication use. During the scheduled study clinic visits, patients' daily recording of pain score and medication list will be reviewed. In addition, European Quality of Life Five Dimension (“EQ-5D”), European Organization for the Research and Treatment of Cancer Quality of Life Questionnaire (“EORTC QLQ-C30”), Patient Global Impression of Change (“PGI-C”) and Patient Global Impression of Severity (“PGI-S”), and Brief Pain Inventory (Short Form) (“BPI-SF”) will be administered to collect health status data.

At completion of the study, participants will return to the site for an EOS visit (approximately 14 days after Cycle 3 Day 15). During the EOS visit, eligible participants will have the option to enroll in the optional OLE phase.

Participants who permanently discontinue study treatment early for any reason, should return to the study site as soon as possible to complete the end of treatment (“EOT”) visit prior to study treatment discontinuation or as close as possible to the last dose of study treatment, and will not be eligible to enroll in the optional OLE phase.

The Schema for this Phase 3 clinical trial is provided in FIG. 2 .

Example 4: Multiple Myeloma

The purpose of this study will be to assess the safety, efficacy nirogacestat in combination with an agent that targets B-cell maturation antigen (BCMA), e.g., an Antibody Drug Conjugate (ADC), Bispecific Antibody, CAR-T therapy, or Monoclonal antibody, in adults with relapsed or refractory multiple myeloma

Measurable Endpoints may include

-   -   DE Phase: Number of participants achieving ORR (ORR is defined         as the percentage of participants with PR or better, according         to the International Myeloma Working Group “IMWG” Response         Criteria).     -   CE Phase: Number of participants achieving Clinical Benefit Rate         (CBR) (CBR is defined as the percentage of participants with         advanced or metastatic cancer who have achieved complete         response, partial response and stable disease to a therapeutic         intervention in clinical trials of anticancer agents).     -   DE Phase and CE Phase: Number of participants achieving Partial         Response (“PR”): Number of participants with PR according to         IMWG criteria will be analyzed.     -   DE Phase and CE Phase: Number of participants achieving Very         Good Partial Response (“VGPR”): Number of participants with VGPR         according to IMWG criteria will be analyzed.     -   DE Phase and CE Phase: Number of participants achieving Complete         Response (CR): Participants with CR according to IMWG criteria         will be analyzed.     -   DE Phase and CE Phase: Nirogacestat concentration when         administered in combination with a second agent: Blood samples         will be collected for concentrations of nirogacestat.     -   CE Phase: Number of participants achieving Progression-free         survival (PFS) (PFS is defined as the time from randomization         until the earliest date of confirmed progressive disease (PD)         per IMWG, or death due to any cause).     -   CE Phase: Duration of response (DoR) (DoR is defined as the time         from first documented evidence or PR or better until progressive         disease per IMWG or death due to progressive disease among         participants who achieve confirmed partial response or better).     -   CE Phase: Time to response (TTR) (TTR is defined as the time         between the date of randomization and the first documented         evidence of response (PR or better), among participants who         achieve a response (confirmed PR or better)).     -   CE Phase: Number of participants achieving Overall survival (OS)         (OS is defined as the time from randomization until death due to         any cause).

Additional Endpoints may include

-   -   Overall Response Rate (ORR) (ORR is defined as the proportion of         participants who achieve partial response (PR) or better         according to the IMWG 2016 criteria).     -   Very Good Partial Response (VGPR) or Better Response Rate (VGPR         or better response rate is defined as the proportion of         participants who achieve a VGPR or better response (stringent         complete response (“sCR”)+complete response (“CR”)+VGPR)         according to the IMWG 2016 criteria).     -   Complete Response (CR) or Better Response Rate (CR or better         response rate is defined as the proportion of participants who         achieve a CR or better response (sCR+CR) according to the IMWG         2016 criteria).     -   Stringent Complete Response (sCR) Rate (sCR rate is defined as         the proportion of participants who achieve an sCR according to         the IMWG 2016 criteria).     -   Duration of Response (Duration of response is defined as time         from date of initial documentation of a response (PR or better)         to date of first documented evidence of progressive disease         (PD), per IMWG 2016 criteria).     -   Time to Response (Time to response is defined as the time         between date of first dose of study treatment and the first         efficacy evaluation at which the participant has met all         criteria for PR or better).

Inclusion Criteria may include:

-   -   Documented diagnosis of relapsed/refractory multiple myeloma         (“MM”) with measurable disease (serum, urine, or free light         chain (“FLC”) per IMWG criteria     -   At least 3 prior lines of MM therapy, including a proteasome         inhibitor, immunomodulatory agent, and anti-CD38 antibody         (unless contraindicated), and refractory to the last treatment         line.     -   Eastern Cooperative Oncology Group (“ECOG”) 0 or 1     -   Absence of donor (product)-specific anti-HLA antibodies     -   Participants with ECOG performance status of 0-1, unless ECOG         less than equal to (<=)2 is due solely to skeletal complications         and/or skeletal pain due to MM.     -   Participants with measurable disease defined as at least one of         the following: Serum M-protein greater than equal to (>=)0.5         gram per deciliter (>=5 gram per liter) or Urine M-protein>=200         mg per 24 hours or Serum free light chain (“FLC”) assay:         Involved FLC level>=10 mg per deciliter (>=100 mg per Liter) and         an abnormal serum FLC ratio (<0.26 or >1.65).

All publications, patents, and patent applications mentioned in this specification are incorporated herein by reference in their entirety to the same extent as if each individual publication, patent, or patent application was specifically and individually indicated to be incorporated by reference in its entirety. Where a term in the present application is found to be defined differently in a document incorporated herein by reference, the definition provided herein is to serve as the definition for the term.

While the invention has been described in connection with specific aspects thereof, it will be understood that invention is capable of further modifications and this application is intended to cover any variations, uses, or adaptations following, in general, the principles and including such departures from the present disclosure that come within known or customary practice within the art to which the invention pertains and can be applied to the essential features hereinbefore set forth, and follows in the scope of the claimed. 

1. A method for treating desmoid tumor in a patient in need thereof comprising orally administering to the patient 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, wherein the method comprises one or more of: (a) upon the patient having a Grade 3 diarrhea persisting for at least 3 days despite maximal medical therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the diarrhea is resolved to no higher than a Grade 1 diarrhea or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (b) upon the patient having a Grade 3 folliculitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the folliculitis is resolved to no higher than a Grade 1 folliculitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (c) upon the patient having a Grade 3 maculopapular rash, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the maculopapular rash is resolved to no higher than a Grade 1 maculopapular rash or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (d) upon the patient having a Grade 3 hidradenitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hidradenitis is resolved to no higher than a Grade 1 hidradenitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (e) upon the patient having Grade 3 hypophosphatemia persisting for at least 7 days despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypophosphatemia is resolved to no higher than a Grade 1 hypophosphatemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (f) upon the patient having Grade 3 hypokalemia despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypokalemia is resolved to no higher than a Grade 1 hypokalemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; and (g) upon the patient having an alanine transaminase (ALT) or aspartate aminotransferase (AST) of 3 to 5 times upper limit of normal (ULN), withholding the nirogacestat or pharmaceutically acceptable salt thereof until the ALT, AST, or both are resolved to no higher than 3 times ULN or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 2. The method of claim 1, further comprising one or more of: (h) upon the patient having an ALT or AST of greater than 5 times ULN, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof; (i) upon the patient having anaphylaxis or other severe hypersensitivity reaction, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof; and (j) for another severe adverse reaction or in the event of a life-threatening adverse reaction, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the adverse reaction is resolved to no higher than a Grade 1 adverse reaction or baseline and then, after carefully considering the potential benefit and likelihood recurrence of the adverse reaction, (A) restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily and (B) upon recurrence of the severe or life-threatening adverse reaction at the 100 mg (free base equivalent dose) twice daily dose, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof
 3. The method of claim 1, wherein the method comprises (a) upon the patient having a Grade 3 diarrhea persisting for at least 3 days despite maximal medical therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the diarrhea is resolved to no higher than a Grade 1 diarrhea or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 4. The method of claim 1, wherein the method comprises (b) upon the patient having a Grade 3 folliculitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the folliculitis is resolved to no higher than a Grade 1 folliculitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 5. The method of claim 1, wherein the method comprises (c) upon the patient having a Grade 3 maculopapular rash, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the maculopapular rash is resolved to no higher than a Grade 1 maculopapular rash or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 6. The method of claim 1, wherein the method comprises (d) upon the patient having a Grade 3 hidradenitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hidradenitis is resolved to no higher than a Grade 1 hidradenitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 7. The method of claim 1, wherein the method comprises (e) upon the patient having a Grade 3 hypophosphatemia persisting for at least 7 days despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypophosphatemia is resolved to no higher than a Grade 1 hypophosphatemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 8. The method of claim 1, wherein the method comprises (f) upon the patient having a Grade 3 hypokalemia despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypokalemia is resolved to no higher than a Grade 1 hypokalemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 9. The method of claim 1, wherein the method comprises (g) upon the patient having an ALT or AST of 3 to 5 times ULN, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the ALT, AST, or both are resolved to no higher than 3 times ULN or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 10. The method of claim 1, wherein the method comprises (h) upon the patient having an ALT or AST of greater than 5 times ULN, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof.
 11. The method of claim 1, wherein the method comprises (i) upon the patient having anaphylaxis or other severe hypersensitivity reaction, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof.
 12. A method for treating desmoid tumor in a patient in need thereof comprising orally administering to the patient 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, wherein the method comprises: (a) upon the patient having a Grade 3 diarrhea persisting for at least 3 days despite maximal medical therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the diarrhea is resolved to no higher than a Grade 1 diarrhea or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (b) upon the patient having a Grade 3 folliculitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the folliculitis is resolved to no higher than a Grade 1 folliculitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (c) upon the patient having a Grade 3 maculopapular rash, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the maculopapular rash is resolved to no higher than a Grade 1 maculopapular rash or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (d) upon the patient having a Grade 3 hidradenitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hidradenitis is resolved to no higher than a Grade 1 hidradenitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (e) upon the patient having Grade 3 hypophosphatemia persisting for at least 7 days despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypophosphatemia is resolved to no higher than a Grade 1 hypophosphatemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (f) upon the patient having Grade 3 hypokalemia despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypokalemia is resolved to no higher than a Grade 1 hypokalemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; and (g) upon the patient having an ALT or AST of 3 to 5 times ULN, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the ALT, AST, or both are resolved to no higher than 3 times ULN or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 13. The method of claim 1, wherein the method comprises: (a) upon the patient having a Grade 3 diarrhea persisting for at least 3 days despite maximal medical therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the diarrhea is resolved to no higher than a Grade 1 diarrhea or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (b) upon the patient having a Grade 3 folliculitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the folliculitis is resolved to no higher than a Grade 1 folliculitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (c) upon the patient having a Grade 3 maculopapular rash, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the maculopapular rash is resolved to no higher than a Grade 1 maculopapular rash or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (d) upon the patient having a Grade 3 hidradenitis, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hidradenitis is resolved to no higher than a Grade 1 hidradenitis or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (e) upon the patient having Grade 3 hypophosphatemia persisting for at least 7 days despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypophosphatemia is resolved to no higher than a Grade 1 hypophosphatemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (f) upon the patient having Grade 3 hypokalemia despite maximal replacement therapy, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the hypokalemia is resolved to no higher than a Grade 1 hypokalemia or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (g) upon the patient having an ALT or AST of 3 to 5 times ULN, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the ALT, AST, or both are resolved to no higher than 3 times ULN or baseline and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily; (h) upon the patient having an ALT or AST of greater than 5 times ULN, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof; (i) upon the patient having anaphylaxis or other severe hypersensitivity reaction, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof; and (j) for another severe adverse reaction or in the event of a life-threatening adverse reaction, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the adverse reaction is resolved to no higher than a Grade 1 adverse reaction or baseline and then, after carefully considering the potential benefit and likelihood recurrence of the adverse reaction, (A) restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily and (B) upon recurrence of the severe or life-threatening adverse reaction at the 100 mg (free base equivalent dose) twice daily dose, permanently discontinuing treatment with the nirogacestat or pharmaceutically acceptable salt thereof.
 14. The method of claim 1, wherein upon the patient having a Grade 3 dermatologic reaction, withholding the nirogacestat or pharmaceutically acceptable salt thereof until the dermatologic reaction is resolved to no higher than a Grade 1 dermatologic reaction and then restarting oral administration of the nirogacestat or pharmaceutically acceptable salt thereof at a dose of 100 mg (free base equivalent dose) twice daily.
 15. The method of claim 1, wherein the patient has a mutation in the adenomatous polyposis coli (APC) tumor suppressor gene.
 16. The method of claim 1, wherein the patient has a mutation in the CTNNB1 (β-catenin) gene.
 17. The method of claim 1, wherein the patient was previously treated with a tyrosine kinase inhibitor.
 18. The method of claim 1, wherein the patient has intraabdominal tumors.
 19. The method of claim 1, wherein the patient is an adult.
 20. (canceled)
 21. The method of claim 1, wherein the patient has refractory or recurrent disease after previous treatment.
 22. (canceled)
 23. The method of claim 1, wherein the patient is a post-menopausal woman.
 24. (canceled)
 25. A method for treating desmoid tumor in a patient having a family history of familial adenomatous polyposis comprising orally administering to the patient 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily.
 26. (canceled)
 27. The method of claim 1, wherein the nirogacestat or pharmaceutically acceptable salt thereof is nirogacestat dihydrobromide.
 28. The method of claim 1, wherein the patient, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, exhibits a C_(max) of nirogacestat of from about 480 to about 950 ng/mL.
 29. (canceled)
 30. (canceled)
 31. The method of claim 1, wherein the patient, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, exhibits an AUC_(last) of nirogacestat of less than 4000 ng·h/mL.
 32. The method of claim 1, wherein the patient, after initial administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof, exhibits an AUC_(last) of nirogacestat of from about 2000 to about 4000 ng·h/mL.
 33. (canceled)
 34. (canceled)
 35. The method of claim 1, wherein the patient exhibits, at steady state exposure from administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, a C_(max) of nirogacestat of from about 1000 to 1500 ng/mL.
 36. (canceled)
 37. The method of claim 1, wherein the patient exhibits, at steady state exposure from administration of 150 mg (free base equivalent dose) of nirogacestat or a pharmaceutically acceptable salt thereof twice daily, an AUC_(tau) of nirogacestat of from about 5000 to about 8000 ng·h/mL. 38-44. (canceled) 